From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Fri, 16 Sep 2011 13:50:15 +0200
From: Peter Rajnoha <prajnoha@redhat.com>
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Subject: Re: [linux-lvm] can't make snapshot
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To: Joseph Graham <t67t67t67@gmail.com>
Cc: LVM general discussion and development <linux-lvm@redhat.com>

On 09/16/2011 12:41 PM +0100, Joseph Graham wrote:
> lvcreate --size 100M --snapshot --name root_snap /dev/VolGroup00/root
> -vvv 2> outfile
> 
> http://ompldr.org/vYWRqbg/outfile

I see:

 "Uevent not generated! Calling udev_complete internally to avoid process lock-up."

in the log. This looks like a problem we've discovered recently. See also:

  http://www.redhat.com/archives/dm-devel/2011-August/msg00075.html

That happens when namespaces are in play. This was also found while using
the Chrome web browser (which makes use of the namespaces for sandboxing).

Do you use Chrome web browser?

Peter